B
Mode is most frequent number
D
Add up all of the heights which comes to 221,642. Then divide by the number of instances which is 8
Nearest is D 27,700
A
Add up all of the numbers and divide it by the number of instances:
So answer is 69
a) Louise
b) 6kg
41-35
c) Gillian & Fatima
d) 3
Jeannie, Sarah & Fatima
e) 11 months
f) 224kg
37+41+35+38+34+39
g) See below..
a) 5
Mode is the most common/frequent number in the sequence
b) 5
Mean is the average of all of the numbers once added together. Total/Number of numbers
So 50/10
a) 2
Mode is the most common number
b) 15
Range is highest – lowest
c) 4
Mean = Average. Add up all of the numbers and divide by the number of instances
40/10
a) 4mins
Sally less Anna
b) 80mins
15 + 17+ 14+ 18+ 16
c) 16mins
80/5
d) 1km
Peter took 15mins. If its 4km/h he walks, then after 15mins, he walks 1km
16
5 numbers with mean 28 = 140 in total (5 * 28)
12 numbers with mean of 11 = 132 in total (12 * 11)
Total = 272
Mean = 272/17
a) 4
- Mean of 7 numbers = 12. Total = 84
- If 8th number added and mean is 11, total must now be 88 (8*11)
- So , the number included = 88-84 = 4
a) 8 minutes
Mode is most common number.
b) 6 minutes
Range is highest less lowest. 10 – 4
c) 7 minutes
Mean is Average. So add up all the times and divide by number of times
35/5 = 7 minutes
d) 1 minute
If mean is 6 and there are 6 days on record, then the total number of minutes late is 6 * 6. Remember , mean= total/number of instances. So 6=total/number of instances
So 36 – 35 = 1 minute
e) Bus was not late on the other days as the mean is 4 and number of days is 9. So 36 minutes late in total which is the same as the end of day 6
a) 8
Mode = most common score. Scores were 9,6,8,4,8
b) 5
Range = 9-4
c) 7
9+6+8+4+8 = 35. Mean is average 35/5
d) 4
6.5 * 6 (6 being number of tests) = 39
French score is 39-35 = 4
e) 2/3
9/10; 6/10; 8/10; 4/10; 8/10; 4/10
He passed 4 out of 6 tests so 4/6 or 2/3
f) 35%
History score before was 4/10 – 40%
Now he scores 15/20 = 75%
Improvement = 35%
a) 7
Mode is the most common number. This is 7
b) 8
8+7+11+6+9+7 = 48
48/6
c) 5
Range is highest minus lowest
a) 10
Mean is average. So its 17+12+8+16+2+5+10 = 70 / number of instances = 70/7
b) 15
Range is Highest – Lowest
c) 14
If mean is 10, then work backwards. Mean = Total/number of instances
This means 40 = Total/4
So total has to come to 40 and therefore, missing number is 40-5-7-12
a) 3
Mean = 3+4+2+0+1+8 = 18/(number of instances) = 18/6
b) 8
Range = Difference lowest v highest = 8-0
c) 10
If Mean increases to 4 after 7 games, then total of 28 goals scored.
Next game would be 10
10kg
- Add up all of the numbers
- 3+6+9+22+28+1+6+5 = 80
- 8 sharks so average weight is 10kg
Use the inverse operation of 17 * 11 = 187
3
Range represents difference between highest and lowest. So this would be 9-6 = 3
8
- Work backwards…..Mean = total of all instances/number of instances
- 6 = ? /5
- Rearrange = 6×5 = ?
- ? = 30. Given you know the total of the other days as 22, the missing day is 8
a) 20 minutes 20 seconds
In total its 19 minutes and 80 seconds = 20 minutes 20 seconds
b) 5 minutes 5 seconds
(20 minutes 20 seconds)/ 4 . If not sure, do the minutes first which is 5 minutes average. Then do the seconds which is 5 seconds average
c) 6 minutes 14 seconds
Range is the difference between the highest and lowest times. (8 minutes 17 seconds) less (2 minutes 3 seconds) = 6 minutes 14 seconds
a) 14 minutes 30 seconds
Add up minutes first = 4+5+4 = 13minutes
Add up seconds and convert to minutes and seconds = 90 seconds = 1minute 30 seconds
Total = 14 mins 30 seconds
b) 4 minutes 50 seconds
Mean = Total /3
So 14 mins 30 seconds / 3
One approach is to convert to seconds and then back to minutes. So (14*60)+30 = 840+30 = 870
870/3 = 290 seconds = 4 minutes 50 seconds
i) 14C
ii) 9C
On Friday
iii) 7C
18C-11C
B)
i) 8C difference on Thursday
ii) 56/7 = 8C
Total of all temperatures/ number of recorded temperatures
Range is difference between highest and lowest numbers